:root{--bg: #ffffff;--surface: #f5f5f5;--border: #e5e5e5;--text: #111111;--muted: #888888;--accent: #0057ff;--radius: 16px;--shadow: 0 2px 16px rgba(0, 0, 0, .06);--nav-h: 68px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:DM Sans,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;overscroll-behavior:none}.app{max-width:480px;margin:0 auto;min-height:100svh;display:flex;flex-direction:column;position:relative}.app-header{padding:20px 20px 16px;text-align:center;border-bottom:1px solid var(--border);background:var(--bg);position:sticky;top:0;z-index:10}.app-title{font-family:Space Grotesk,sans-serif;font-size:2.2rem;font-weight:700;text-transform:uppercase;letter-spacing:.01em;color:var(--accent)}.app-sub{display:none}.app-main{flex:1;padding:28px 16px calc(var(--nav-h) + env(safe-area-inset-bottom,0px) + 28px);overflow-y:auto}.db-error{background:#fff3cd;border:1px solid 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env(safe-area-inset-bottom,0px));-webkit-tap-highlight-color:transparent}.login-scroll-label{font-size:.82rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em}.preview-back-btn{display:flex;align-items:center;justify-content:center;gap:6px;background:none;border:none;color:var(--muted);font-size:.82rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;cursor:pointer;padding:32px 20px 12px;-webkit-tap-highlight-color:transparent}.phone-frame-wrapper{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:0 28px calc(28px + env(safe-area-inset-bottom,0px));gap:10px}.preview-label{font-size:.65rem;font-weight:800;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);text-align:center}.phone-mockup{width:min(88vw,360px);height:calc(100svh - 150px);max-height:610px;border:8px solid #1c1c1e;border-radius:44px;overflow:hidden;background:var(--bg);box-shadow:0 24px 64px 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.last-week-label{color:#fff9}.how-it-works{background:var(--surface);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:12px}.how-row{display:flex;align-items:flex-start;gap:10px;font-size:.82rem;color:var(--muted);font-weight:500;line-height:1.4}.how-row strong{color:var(--text);font-weight:700}.how-icon{flex-shrink:0;color:var(--muted);margin-top:1px}@media (min-width: 640px){.app{max-width:500px}.app-main{padding-left:24px;padding-right:24px}.score-num{font-size:5rem}.log-btn{padding:32px 16px}}